Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
  • F04D1/06—Multi-stage pumps
  • F04D1/063—Multi-stage pumps of the vertically split casing type
  • F04D1/066—Multi-stage pumps of the vertically split casing type the casing consisting of a plurality of annuli bolted together
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
  • F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
  • F04C19/005—Details concerning the admission or discharge
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
  • F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
  • F04C19/001—General arrangements, plants, flowsheets
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
  • F04C7/00—Rotary-piston machines or pumps with fluid ring or the like
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
  • F04C2240/00—Components
  • F04C2240/20—Rotors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/60—Mounting; Assembling; Disassembling
  • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
  • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
  • F05D2210/00—Working fluids
  • F05D2210/10—Kind or type
  • F05D2210/11—Kind or type liquid, i.e. incompressible
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
  • F05D2260/00—Function
  • F05D2260/30—Retaining components in desired mutual position
  • F05D2260/31—Retaining bolts or nuts

Definitions

• This application relates to a pump; and more particularly to a ring section pump having tie rods.
• Figures 1 A and 1 B and Figures 2A and 2B show ring section tie-rod pump that are known in the art.
• Figures 1 A and 1 B show a ring section tie-rod pump, e.g., that may be vertically arranged, mounted and used in relation to a sump.
• Figures 2A and 2B show a ring section tie-rod pump, e.g., that may be horizontally-mounted and used in relation to other pumping applications.
• tie-rod pumps are built with tie-rods extending the full length of all stages. This solution is adequate for shorter pumps; however, for longer pumps this arrangement becomes difficult to assemble, subject to more resonant vibration problems and costly due to tie rods having to handle the full pressure of the whole pump. Long spans of tie rods are also less able to resist twisting of ring section assembly. In effect, the current design is limited to only a single size of tie- rod that spans the entire length of pump assembly.
• the present invention provides a technique for installing one or more intermediate flanges or pieces that accept tie-rod terminations in a similar manner as pump assembly ends, and from both sides.
• Assembly difficulty is alleviated by the present invention by reducing the span between tie-rod ends.
• the assembly process is safer due to the reduction of unsupported stages before installing tie-rods. This also results in better component alignment for the pump and easier measurement of alignment between shorter spans.
• the present invention also provides a solution to potential structural vibration problems. This arrangement allows for greater options for changing natural frequency of pump structure to reduce resonant vibrations.
• the present invention is an optimized solution to pressure handling capabilities of the ring-section pump. This allows for a reduction of tie-rods for low pressure sections of the pump. Also this allows an increase in stages and pressure handling without costly material addition.
• the invention also reinforces the pump assembly more in the region that the ring-sections experience the highest between ring-section torque (force trying to spin sections relative to each other).
• the present invention may take the form of apparatus, e.g., including a ring section pump, featuring
• a low-pressure end configured to receive fluid to be pumped into the ring section pump;
• high-pressure end configured to provide the fluid to be pumped from the ring section pump;
• At least one intermediate tie rod combination having at least one intermediate flange with upper tie rods configured to couple together the at least one intermediate flange and the high-pressure end and with lower tie rods configured to couple together the at least one intermediate flange and the low-pressure end.
• the apparatus may include one or more of the following features:
• the low-pressure end may include an inlet flange; the high-pressure end may include an outlet/discharge flange; and the upper tie rods may couple together the at least one intermediate flange and the outlet/discharge flange, and the lower tie rods may couple together the at least one intermediate flange and the inlet flange.
• the outlet/discharge flange may be configured with apertures to receive ends of the upper tie rods.
• the outlet/discharge flange may be configured with threaded apertures to receive threaded ends of the upper tie rods to couple together the outlet/discharge flange and the upper tie rods.
• the inlet flange may be configured with corresponding apertures to receive corresponding ends of the lower tie rods.
• the inlet flange may be configured so the corresponding apertures allow threaded corresponding ends of the lower tie rods to be passed through and fastened to the inlet flange with corresponding threaded nuts.
• the at least one intermediate flange may be configured with a first set of associated apertures to receive opposing ends of the upper tie rods to couple together the at least one intermediate flange and the outlet/discharge flange, and may also be configured with a second set of associated apertures to receive opposing corresponding ends of the lower tie rods to couple together the at least one intermediate flange and the inlet flange.
• the first set of associated apertures may be configured to allow threaded opposing ends of the upper tie rods to be passed through and fastened to the at least one intermediate flange with a first set of associated threaded nuts.
• the second set of associated apertures may be configured to allow threaded opposing corresponding ends of the lower tie rods to be passed through and fastened to the at least one intermediate flange with a second set of associated threaded nuts.
• the at least one intermediate flange may include at least one intermediate flange coupling portion; and the ring section pump may include adjacent ring sections or stages configured to receive and engage the at least one intermediate flange coupling portion at at least one intermediate location between the high- pressure end and the low-pressure end.
• the adjacent ring sections or stages may be configured with a notched portion to receive and engage the at least one intermediate flange coupling portion.
• the ring section pump may include ring sections or stages configured between the low-pressure end and the high-pressure end, each ring section or stage may be configured with a casing, an impeller, a diffuser as well as other
• the at least one intermediate tie rod combination may include a high pressure intermediate tie rod combination with the upper tie rods coupling together a first set of the ring sections stages between the at least one intermediate flange and the high-pressure end.
• the at least one intermediate tie rod combination may also include a lower pressure intermediate tie rod combination with the lower tie rods coupling together a second set of the ring sections or stages between the at least one intermediate flange and the low-pressure end.
• the number of upper tie rods in the high pressure intermediate tie rod combination may be greater than a corresponding number of the lower tie rods in the low pressure intermediate tie rod combination, e.g., based upon the high pumping pressure experienced by the high pressure intermediate tie rod combination during normal operation, as well as depending on the pump application.
• the number of the first set of the ring sections or stages coupled together in the high pressure intermediate tie rod combination may be less than the
• the low-pressure end may include a suction bell configured on one end of the ring section pump to receive the fluid to be pumped into the ring section pump;
• the high-pressure end may include a discharge casing configured on an opposite end of the ring section pump to provide the fluid to be pumped from the ring section pump and to mount the ring section pump; and
• the at least one intermediate flange may be configured so the upper tie rods couple together the at least one intermediate flange and the discharge casing, and so the lower tie rods couple together the at least one intermediate flange and the suction bell.
• tie-rods are configured for spanning all stages, e.g., possibly passing through or around an intermediate flange.
• embodiments may include having one set of tie-rods from the discharge flange to the intermediate flange, and another set of tie-rods from the inlet flange to the discharge flange.
• a first intermediate tie rod combination may include a first intermediate flange with upper tie rods
• the second intermediate tie rod combination may include lower tie rods configured to couple together the second intermediate flange and the low- pressure end.
• Embodiments are envisioned, and the scope of the invention is also intended to include apparatus featuring a low-pressure end, a high-pressure end and at least one intermediate tie rod combination.
• the low-pressure end may be configured to receive fluid to be processed.
• the high-pressure end may be configured to provide the fluid to be processed.
• the at least one intermediate tie rod combination may include at least one intermediate flange with upper tie rods configured to couple together the at least one intermediate flange and the high-pressure end and with lower tie rods configured to couple together the at least one intermediate flange and the low-pressure end.
• the apparatus may include, or take the form of such a ring section pump, as well as other types of equipment either now known or later developed in the future configured with a low-pressure end and a high-pressure end coupled together with sections or stages for processing a fluid.
• the apparatus may also include one or more of the other features set forth herein.
• Figure 1A shows a perspective view of a ring section tie-rod pump having conventional tie rods arranged between low-pressure and high-pressure pump ends, e.g., that may be vertically arranged, mounted and used in relation to a sump, and that is known in the art.
• Figure 1 B shows a cross-sectional view of the ring section tie-rod pump shown in Figure 1A.
• Figure 2A show a perspective view of a ring section tie-rod pump having conventional tie rods arranged between front and back pump ends, e.g., that may be horizontally mounted and used in relation to other pumping applications.
• Figure 2B show a cross-sectional view of a ring section tie-rod pump having conventional tie rods arranged between low-pressure and high-pressure pump ends, e.g., that may be horizontally mounted and used in relation to other pumping applications.
• Figure 3A shows a perspective view of a ring section tie-rod pump according to some embodiments of the present invention, having at least one intermediate flange combination with upper and lower tie rods arranged between low-pressure and high-pressure pump ends, e.g., that may be vertically arranged, mounted and used in relation to a sump.
• Figure 3B shows a cross-sectional view of the ring section tie-rod pump shown in Figure 3A.
• Figure 3C shows an enlarged cross-sectional view of an intermediate part/portion of the ring section tie rod pump as circled and shown in Figure 3B.
• FIG. 1 The Basic Apparatus 10
• Figures 3A, 3B and 3C show the present invention in the form of apparatus 10, e.g., including a ring section pump 10, featuring
• a low-pressure end 12 configured to receive fluid to be pumped into the ring section pump 10;
• a high-pressure end 14 configured to provide the fluid to be pumped from the ring section pump 10;
• At least one intermediate tie rod combination having at least one intermediate flange 16 with upper tie rods 18 configured to couple together the at least one intermediate flange 16 and the high-pressure end 14 and with lower tie rods 20 configured to couple together the at least one intermediate flange 16 and the low-pressure end 12.
• the ring section pump 10 may include one or more of the following features: Example of Flange-to-Flange Coupling Arrangement Consistent with that shown in Figures 3A, 3B and 3C, the low-pressure end 12 may include a suction bell 12a and a suction bell or inlet flange 12b; the high- pressure end 14 may include an outlet/discharge casing or flange 14a and an outlet 14;and the upper tie rods 18 may couple together the at least one intermediate flange 16 and the outlet/discharge casing or flange 12b, and the lower tie rods 20 may couple together the at least one intermediate flange 16 and the suction bell or inlet flange 12b.
• the upper and lower tie rods 18, 20 may couple together the at least one intermediate flange 16, the outlet/discharge casing or flange 14a and the suction bell or inlet flange 12b, as follows:
• the outlet/discharge casing or flange 14a may be configured with apertures, one of which is labeled 14a' (see Fig. 3B), to receive ends, one of which is labelled 18a, of the upper tie rods 18.
• the apertures 14a' may be configured as threaded apertures 14a' (see Fig. 3B), and the ends 18a of the upper tie rods 18 may be configured as threaded ends 18a (see Fig. 3B).
• the threaded apertures 14a' of the outlet/discharge casing or flange 14a may be configured to receive the threaded ends 18a (see Fig.
• the suction bell or inlet flange 12b may be configured with corresponding apertures, one of which is labeled 12b' (see Fig. 3A), to receive corresponding ends, one of which is labelled 20a (see Fig. 3A), of the lower tie rods 20.
• the corresponding ends 20a may be configured as threaded corresponding ends 20a.
• corresponding aperture 12b' may be configured to allow the threaded corresponding ends 20a of the lower tie rods 20 to be passed through and fastened to the suction bell or inlet flange 12b with corresponding threaded nuts, one of which is labeled 20a. While the scope of the invention is disclosed using a nut and bolt coupling arrangement to couple together the lower tie rods 20 and the suction bell or inlet flange 12a, the scope of the invention is not intended to be limited to the same.
• the corresponding apertures 12b' of the suction bell or inlet flange 12a may be configured as threaded corresponding apertures 12b' to receive the threaded ends 20a (see Fig. 3B) of the lower tie rods 20 to couple together the suction bell or inlet flange 12a and the lower tie rods 20, consistent with that disclosed herein, within the spirit of the present invention.
• the at least one intermediate flange 16 may be configured with various apertures, one of which is labelled 16c (see Fig. 3A and 3C).
• the various apertures may include a first set of associated apertures like aperture 16c (see Fig. 3A and 3C) to receive opposing ends 18b (see Fig. 3B and 3C) of the upper tie rods 18 to couple together the at least one intermediate flange 16 and the
• the first set of associated apertures 16c may be configured to allow threaded opposing ends 18b of the upper tie rods 18 to be passed through and fastened to the at least one intermediate flange 16 with a first set of associated threaded nuts, one of which is labeled 16a.
• the various apertures may also include a second set of associated apertures like aperture 16c to receive opposing corresponding ends 20b (see Fig. 3A) of the lower tie rods 20 to couple together the at least one intermediate flange 16 and the inlet or suction bell flange 12b.
• the second set of associated apertures 16c may be configured to allow threaded opposing corresponding ends 20b of the lower tie rods 20 to be passed through and fastened to the at least one intermediate flange 16 with a second set of associated threaded nuts like 16a.
• the at least one intermediate flange 16 may include at least one intermediate flange coupling portion16d (see Figs 3B and 3C); and the ring section pump 10 may include adjacent ring sections or stages 30', 30", 30"' (Fig. 3C) configured to receive and engage the at least one intermediate flange coupling portion 16d at at least one intermediate location between the high-pressure end 14 and the low-pressure end 12. Consistent with that shown in Figure 3C, one of the adjacent ring sections or stages 30' may be configured with a notched portion 30'a for receiving the at least one intermediate flange coupling portion 16d in relation to the other adjacent ring sections or stages 30".
• the present invention is disclosed using the intermediate flange coupling portion 16d, the scope of the invention is not intended to be limited to the same.
• the at least one intermediate flange 16 either does not include the at least one intermediate flange coupling portion16d, or includes other types of kinds of arrangements for coupling the intermediate flange 16 to one or more of the ring or stages 30 (see Figure 3A) within the spirit of the underlying invention.
• the ring section pump 10 may include ring sections or stages 30 configured between the low-pressure end 12 and the high-pressure end 14 in relation to a pump shaft S.
• each ring section or stage 30 may be configured with a casing, impeller, diffuser, as well as other parts/components, e.g., consistent with that known in the prior art.
• the scope of the invention is not intended to be limited to using any particular type or kind of ring sections or stages either now known or later developed in the future.
• the at least one intermediate tie rod combination may include a high pressure intermediate tie rod combination with the upper tie rods 18 coupling together a first set of the ring sections or stages 30 between the at least one intermediate flange 16 and the high- pressure end 14, and may also include a lower pressure intermediate tie rod combination with the lower tie rods 20 coupling together a second set of the ring sections or stages 30 between the at least one intermediate flange 16 and the low- pressure end 12.
• the number of upper tie rods 18 in the high pressure intermediate tie rod combination may be greater than a corresponding number of the lower tie rods 20 in the low pressure intermediate tie rod combination, e.g., based upon the fact that the fluidic pressure increases in a substantially linear way along the length of the ring sections or stages 30 extending from the low-pressure 12 to the outlet 14, so that the pressure in the high pressure end is generally understood to be greater than the pressure in the low pressure end.
• the number of upper tie rods 18 is six (6), four of which are shown, that are symmetrically arranged around the ring sections or stages 30, while the number of lower tie rods 20 is four (4), two of which are shown, that are symmetrically arranged around the ring sections or stages 30.
• the scope of the invention is not intended to be limited to any particular number or arrangement of the upper tie rods 18 in the high pressure intermediate tie rod combination; and embodiments are envisioned having either fewer than six (6) upper tie rods 18 or greater than six (6) upper tie rods 18, e.g., depending on the pump application.
• the scope of the invention is not intended to be limited to any particular number or arrangement of the lower tie rods 20 in the low pressure intermediate tie rod combination; and embodiments are envisioned having either fewer than four (4) lower tie rods 20 or greater than four (4) lower tie rods 20, e.g., depending on the pump application.
• the number of the first set of the ring sections or stages 30 coupled together in the low pressure intermediate tie rod combination may be less that the corresponding number of the second set of the ring sections or stages coupled together in the high pressure intermediate tie rod combination, e.g., depending on the particular pump application.
• the scope of the invention is not intended to be limited to any particular relationship between the first set of the ring sections or stages 30 in the low pressure intermediate tie rod combination and the second set of the ring sections or stages in the high pressure intermediate tie rod combination, e.g., including the number of rings or stages in either set.
• Embodiments are envisioned, and the scope of the invention is intended to include, using at least one intermediate coupling combination having at least one intermediate flange with upper couplers configured to couple together the at least one intermediate flange and the high-pressure end and with lower couplers configured to couple together the at least one intermediate flange and the low- pressure end.
• upper and lower couplers and suitable coupling arrangements may be used instead of upper and lower tie rod and suitable tie rod arrangements.
• the upper and lower couplers may include, or take the form of, clamps and/or suitable clamping arrangements either now known or later developed in the future, which may be suitably adapted to achieve the desired coupling between the at least one intermediate flange and the high-pressure end, and the at least one intermediate flange and the low-pressure end.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

Priority Applications (14)

Applications Claiming Priority (2)

Publications (1)

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Citations (5)

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• 2016
  • 2016-06-29 US US15/196,418 patent/US11118584B2/en active Active
• 2017
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  • 2017-04-12 RU RU2019101805A patent/RU2748244C2/ru active
  • 2017-04-12 EP EP17724141.1A patent/EP3478968B1/de active Active
  • 2017-04-12 ES ES17724141T patent/ES2965344T3/es active Active
  • 2017-04-12 PL PL17724141.1T patent/PL3478968T3/pl unknown
  • 2017-04-12 WO PCT/US2017/027103 patent/WO2018004778A1/en unknown
  • 2017-04-12 DK DK17724141.1T patent/DK3478968T3/da active
  • 2017-04-12 JP JP2018568416A patent/JP7370706B2/ja active Active
  • 2017-04-12 KR KR1020197002367A patent/KR102455165B1/ko active IP Right Grant
  • 2017-04-12 CN CN201780051567.3A patent/CN109642580A/zh active Pending
  • 2017-04-12 CA CA3029397A patent/CA3029397C/en active Active
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• 2018
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• 2019
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